
/**
 * Copyright 2009 cestum.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.waveprotocol.wave.model.document.operation.algorithm.transformer {
import org.waveprotocol.wave.model.document.operation.Attributes;
import org.waveprotocol.wave.model.document.operation.AttributesUpdate;

public class RetainRangeCache extends RangeCache {
	private var parent:Target;
	public function RetainRangeCache(t:Target) {
		super();
		this.parent = t;
	}
	
	
	override function resolveRetain(itemCount:int):void {
		parent.flushAnnotations();
		parent.targetDocument.retain(itemCount);
		parent.otherTarget.targetDocument.retain(itemCount);
	}
	
	
	override function resolveDeleteCharacters(characters:String):void {
		parent.otherTarget.doDeleteCharacters(characters);
	}
	
	
	override function resolveDeleteElementStart(type:String, attributes:Attributes):void {
		parent.otherTarget.doDeleteElementStart(type, attributes);
		++parent.otherTarget.depth;
	}
	
	
	override  function resolveDeleteElementEnd():void {
		parent.otherTarget.doDeleteElementEnd();
		--parent.otherTarget.depth;
	}
	
	
	override  function resolveReplaceAttributes(oldAttributes:Attributes, newAttributes:Attributes):void {
		parent.flushAnnotations();
		parent.targetDocument.retain(1);
		parent.otherTarget.targetDocument.replaceAttributes(oldAttributes, newAttributes);
	}
	
	
	override function resolveUpdateAttributes(update:AttributesUpdate):void {
		parent.flushAnnotations();
		parent.targetDocument.retain(1);
		parent.otherTarget.targetDocument.updateAttributes(update);
	}
}
}